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Finding the Fourth Proportional to 17,376.78, 23,979.99 and 9,418.97

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Solution

The fourth proportional to 17,376.78, 23,979.99 and 9,418.97 is: 12,998.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,376.78 : 23,979.99 = 9,418.97 : x
  2. Step 2: Convert to fraction form
    17,376.78/23,979.99 = 9,418.97/x
  3. Step 3: Cross multiply
    17,376.78x = 23,979.99 × 9,418.97
  4. Step 4: Simplify right side
    17,376.78x = 225,866,686.51
  5. Step 5: Solve for x
    x = 225,866,686.51/17,376.78
  6. Step 6: Final answer
    x = 12,998.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.